JP2005127595A - Heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fin and tube type heat exchanger capable of easily and accurately keeping constant intervals of a number of stacked fins and properly adhering and joining the plate-shaped fins and a flat heat transfer pipe. <P>SOLUTION: A fin collar for keeping the constant intervals of the stacked fins is mounted on a part of the circumference of a through hole formed on the fins for inserting the flat heat transfer pipe and adhering and joining it, and a low fin collar is mounted on a part excluding the fin collar, of the circumference of the through hole. The constant intervals of the stacked fins can be easily and accurately kept by the high fin collar mounted on the part of the circumference of the through hole, and as the fin collars are mounted on the approximately entire circumference of the through hole, the adhesion of the plate-shaped fins and the flat heat transfer pipe can be improved. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention is used in an air conditioner, a refrigerator, and the like, and is composed of a gas such as air flowing between a plurality of stacked flat fins and a fluid such as water and refrigerant flowing in a flat heat transfer tube. The present invention relates to a fin-and-tube heat exchanger that transfers heat between the two.

  In general, a fin-and-tube heat exchanger composed of a large number of laminated flat fins and flat heat transfer tubes is laminated in parallel at regular intervals as shown in FIG. A large number of plate-like fins 1 through which a gas such as air flows, and inserted into these fins 1 at a predetermined pitch at a substantially right angle, a fluid such as water or refrigerant flows inside, and the outer periphery of the cross section is flat. The heat pipe 4 and both ends of the heat transfer pipe 4 are connected to each other, and the heat transfer pipe 4 and the header 5 forming a refrigerant flow path are configured.

As shown in FIG. 9, the fin 1 of the conventional heat exchanger has an inverted trapezoidal shape with a tip wider than the width of the root of the fin 1 in order to maintain a constant interval between the laminated fins 1. A piece 12 is provided. In addition, in order to insert the heat exchanger tube 4 in the fin 1, the through-hole 13 is provided (for example, refer patent document 1 and patent document 2).
Japanese Utility Model Publication No. 60-60590 (first page, FIG. 2) Japanese Patent Laid-Open No. 3-63499 (page 2-3, FIG. 1)

  However, in the above-described conventional configuration, the rising piece 12 is cut off from the fin except for the root and is simply raised to the fin base so that the rising piece easily falls down. In addition, there has been a problem that the original purpose of accurately maintaining a predetermined interval between the fins 1 to be laminated cannot be achieved. The present invention solves such a conventional problem, and easily maintains a fixed interval between a large number of laminated fins, and satisfactorily closely bonds a flat fin and a flat heat transfer tube. An object of the present invention is to provide a heat exchanger that can be used.

  In order to solve the above-described problems, the heat exchanger according to the present invention includes a fin that is stacked on a part of a periphery of a substantially rectangular through hole that is formed in a fin in order to insert and attach a flat heat transfer tube. A fin collar for maintaining a constant interval of the above, or a fixed interval of fins stacked around a substantially rectangular through hole opened in the fin for inserting and closely bonding a flat heat transfer tube In addition to providing a fin collar with a lower height, apart from this fin collar, the fin is provided with a generally cylindrical fin collar whose tip is reflared and whose height is equal to the fixed interval between the stacked fins. is there.

As in the above configuration, a fin collar with the same interval and height of the fins to be laminated around a part of the periphery of a substantially rectangular through hole opened in the fin for inserting and closely bonding a flat heat transfer tube Or a fin that is laminated on the fin surface separately from the fin collar having a low height around a substantially rectangular through-hole formed in the fin in order to insert and attach a flat heat transfer tube By providing a substantially cylindrical fin collar having a height equal to the constant interval and having a flared tip, the fixed interval between the fins to be stacked can be easily and accurately maintained, and a flat transmission can be achieved. A fin collar is provided around the entire circumference, including those with a low height, around a roughly rectangular through-hole opened in the fin for inserting and tightly bonding the heat tube. , In which it is possible to improve the adhesion between the plate-like fins and flat heat transfer tubes.

  According to the heat exchanger of the present invention, it is possible to easily and accurately maintain a fixed interval between the laminated fins, and to improve the adhesion between the flat fins and the flat heat transfer tubes. There is an effect.

  Embodiments of the present invention will be described below with reference to the drawings.

  The basic configuration of the heat exchanger according to the embodiment of the present invention is a general fin composed of a plurality of laminated flat plate-like fins and flat heat transfer tubes shown in FIG. 8 described in the prior art. Since it is the same as an and-tube type heat exchanger, the description is omitted, and the fin shape is characteristic, so the fin shape will be described in detail.

(Embodiment 1)
FIG. 1 is a perspective view of a fin of the fin-and-tube heat exchanger according to the first embodiment, and FIG. 2 is an AA cross-sectional enlarged view of the fin of FIG. 1, in which three fins are stacked.

  1 and 2, the through hole 13 opened in the fin 1 for inserting and closely bonding the heat transfer tube 4 has a shape substantially along the outer periphery of the flat heat transfer tube 4, that is, a substantially rectangular shape. From one of the two long sides of the hole 13, there is a fin collar 21 that rises substantially perpendicular to the fin 1 at a height equal to the fixed interval Pf of the laminated fins, and that the leading end of the fin 13 is bent outwardly of the through hole 13. Is provided. On the long side opposite to one long side of the substantially rectangular through-hole 13 provided with the fin collar 21 having a height equal to the fixed interval Pf of the fins 1 to be stacked, the fixed interval Pf of the fins 1 to be stacked is A fin collar 22 having a low height is provided. A louver 23 that opens in the gas main flow direction is provided in a region between the heat transfer tubes 4 adjacent to each other in the direction perpendicular to the gas main flow direction, that is, in the step direction, on the surface of the fin 1. The height Hl of the louver 23 is formed to be approximately equal to ½ of the constant interval Pf of the fins 1 to be laminated.

  In the above-described configuration, the fins 1 to be laminated are formed by the fin collar 21 that rises substantially perpendicular to the fin 1 at a height equal to the fixed interval Pf of the laminated fins and further bends the tip of the rising toward the outside of the through hole 13. The fixed interval Pf can be easily and accurately maintained, and the height is high over almost the entire circumference of the substantially rectangular through-hole 13 opened in the fin in order to insert and flatly join the flat heat transfer tube 4. Since the fin collar 21 or the fin collar 22 having a low height is provided, the adhesion between the flat fin 1 and the flat heat transfer tube 4 can be improved.

  Further, the fin 1 is provided in a region between the heat transfer tubes 4 adjacent in the direction perpendicular to the gas main flow direction, that is, in the step direction, on the surface of the fin 1, and is constant in the fin 1 that is opened in the gas main flow direction and has a height H1 stacked. Excellent ventilation characteristics and heat transfer performance can be obtained by the louver 23 having about 1/2 the distance Pf.

(Embodiment 2)
FIG. 3 is a perspective view of the fins of the fin-and-tube heat exchanger according to the second embodiment, and FIG. 4 is an enlarged cross-sectional view of the AA cross section of the fins of FIG.

3 to 4, the through hole 13 opened in the fin 1 for inserting and closely bonding the heat transfer tube 4 has a shape substantially along the outer periphery of the flat heat transfer tube 4, that is, a substantially rectangular shape, and the substantially rectangular penetration The two opposite long sides of the hole 13 are alternately raised with a predetermined width from a part of the long side of the through hole 13 so as to rise substantially perpendicular to the fin 1 at a height equal to the fixed interval Pf of the fins 1 to be stacked. A fin collar 31 is provided in which the leading end of the rising portion is bent toward the outside of the through hole 13.

  A fin having a height lower than the fixed interval Pf of the laminated fins 1 except that a fin collar 13 having a height equal to the fixed interval Pf of the laminated fins 1 is provided around the substantially rectangular through hole 13. A collar 32 is provided. In the region between the heat transfer tubes 4 adjacent to each other in the direction perpendicular to the gas main flow direction, that is, in the step direction, on the surface of the fin 1 is provided a cut and raised 33 that opens in the gas main flow direction. The height of the cut and raised is formed to be approximately 1/4 to approximately 3/4 of the fixed interval Pf of the fins 1 to be stacked, and the width Ws of the cut and raised 33 is about 1 of the width Wb of the fin base. / 2 to about 2/5.

  And according to this embodiment, by the fin collar 31 which rises substantially perpendicular to the fin 1 at a height equal to the constant interval Pf of the laminated fins, and further, the leading end of the rise is bent toward the outside of the through hole 13. The fixed interval Pf of the fins 1 to be stacked can be easily and accurately maintained, and the substantially rectangular through hole 13 formed in the fin for inserting and attaching the flat heat transfer tube 4 in close contact with each other. Since the fin collar 31 having a high height or the fin collar 32 having a low height is provided, the adhesion between the flat fin 1 and the flat heat transfer tube 4 can be improved. . In addition, the fin 1 having a height Hs that is open in the gas main flow direction and provided in a region between the heat transfer tubes 4 adjacent to the surface of the fin 1 in a direction perpendicular to the gas main flow direction, that is, in the step direction, is stacked. Excellent ventilation characteristics and heat transfer performance can be obtained by the cut-and-raised portion 33 of about 1/4 to about 3/4 of the distance Pf and about 1/2 to about 2/5 of the width Wb of the fin base.

(Embodiment 3)
FIG. 5 is a perspective view of the fin of the fin-and-tube heat exchanger according to the third embodiment, and FIG. 6 is an AA cross-sectional enlarged view of the fin of FIG. 5, in which three fins are stacked.

  5 and 6, the through hole 13 formed in the fin 1 for inserting and closely bonding the heat transfer tube 4 has a shape substantially along the outer periphery of the flat heat transfer tube 4, that is, a substantially rectangular shape. A fin collar 41 is provided from each of the two short sides of the hole 13 so as to rise substantially perpendicular to the fin at a height equal to the fixed interval Pf of the laminated fins, and the rising tip is bent outwardly of the through hole 13. It has been.

  On the other hand, two long sides of the substantially rectangular through-hole 13 are provided with fin collars 42 that are lower than the fin collars 41 that are provided on the short sides and have a height equal to the fixed interval Pf of the fins to be stacked. Yes. In the region between the heat transfer tubes 4 adjacent to the surface of the fin 1 in the direction perpendicular to the gas main flow direction, that is, in the step direction, ridges 43 and valleys 44 whose ridge lines extend in the step direction are provided alternately.

  In the above-described configuration, from the two short sides of the substantially rectangular through hole 13, the fin rises substantially perpendicularly to the fin 1 at a height equal to the fixed interval Pf of the laminated fins, and the leading end of the rise is directed outward of the through hole 13. The bent fin collar 41 makes it possible to easily and accurately hold the fixed interval Pf of the laminated fins 1, and to the two long sides of the substantially rectangular through hole 13, the fixed interval Pf of the laminated fins Although the fin collar 42 is provided though the height is lower, the substantially rectangular through hole 13 is provided with the fin collar 41 having a high height or the fin collar 42 having a low height over substantially the entire circumference. It is possible to improve the adhesion between the fin 1 and the flat heat transfer tube 4.

  Further, in the region between the heat transfer tubes 4 adjacent to each other in the direction perpendicular to the gas main flow direction, that is, in the step direction, on the surface of the fin 1, ridges 43 and valleys 44 whose ridgelines extend in the step direction are alternately provided. As a result, excellent heat transfer performance can be obtained. In addition, when the heat exchanger configured as described above is used in an outdoor heat exchanger of an air conditioner and the outside air becomes cold during heating operation, it frosts on the surface of the fin, but the high performance is achieved by the temperature boundary layer leading edge effect. Like louvers and cuts that can be obtained, clogging is quick due to frost formation, and it is difficult for heating performance to drop rapidly.

(Embodiment 4)
FIG. 7 is a perspective view of fins of the fin-and-tube heat exchanger according to the fourth embodiment. In FIG. 7, the through-hole 13 opened in the fin 1 for inserting and closely bonding the heat transfer tube 4 has a shape substantially along the outer periphery of the flat heat transfer tube 4, that is, a substantially rectangular shape. Is provided with a fin collar 51 having a height lower than the fixed interval Pf of the fins 1 to be laminated, and a fin collar 51 provided in the through hole 13 formed in the fin 1 for inserting the heat transfer tube 4. Separately, the fin 1 is provided with a substantially cylindrical fin collar 52 having a height equal to the constant interval Pf of the fins 1 to be laminated, the tip of which is flared.

  And according to this embodiment, the constant interval Pf of the fins 1 to be stacked is equal in height to the constant interval Pf of the fins 1 to be stacked, and the constant interval Pf of the fins 1 to be stacked is set by the substantially cylindrical fin collar 52 whose tip is subjected to flaring. The fin collar 51 provided over almost the entire circumference of the through-hole 13 having a low height but a substantially rectangular shape can be easily and accurately held, so that the flat fin-shaped heat exchanger 1 and the flat heat transfer tube 4 are in close contact with each other. The property can be improved.

  Even if the louver 23 according to the first embodiment is formed in the region between the heat transfer tubes 4 adjacent to each other in the step direction on the surface of the fin 1 according to the second, third, and fourth embodiments, the louver 23 is used. The same ventilation characteristics and heat transfer performance can be obtained. Further, even if the cut and raised portion 33 of the second embodiment is formed in a region between the heat transfer tubes 4 adjacent to each other in the step direction on the surface of the fin 1 of the first embodiment, the third embodiment, and the fourth embodiment, Similar ventilation characteristics and heat transfer performance related to the raising 33 can be obtained.

  Further, the undulating portions of the alternately repeated ridges 43 and valleys 44 in which the ridge line of the third embodiment extends in the step direction are arranged in the step direction of the fin 1 surface of the first embodiment, the second embodiment, and the fourth embodiment. Even if it forms in the area | region between the adjacent heat exchanger tubes 4, the same heat-transfer performance and low-temperature frosting characteristic regarding the alternately repeated undulation part of the peak part 43 and the trough part 44 can be acquired.

The perspective view of the fin which shows the 1st Embodiment of this invention AA cross-sectional enlarged view in FIG. 1 (lamination of three fins) The perspective view of the fin which shows the 2nd Embodiment of this invention BB cross-sectional enlarged view in FIG. 3 (lamination of 3 fins) The perspective view of the fin which shows the 3rd Embodiment of this invention CC cross-sectional enlarged view in FIG. 5 (lamination of 3 fins) The perspective view of the fin which shows the 4th Embodiment of this invention A perspective view showing a basic configuration of a general fin and tube heat exchanger Plan view of fins of conventional heat exchanger

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fin 4 Heat-transfer tube 13 Through-hole 21, 31, 41, 52 Fin collar of the height equal to the predetermined space | interval of the laminated fin 22, 32, 42, 51 Fin collar with low height 23 Louver 33 Cut and raise 43 Mountain part 44 Tanibe

Claims (10)

A plurality of plate-like fins that are stacked in parallel at regular intervals and through which a gas such as air flows, and are inserted at a predetermined pitch substantially perpendicular to the fins and closely joined to the fins. In a fin-and-tube heat exchanger in which a fluid such as water or refrigerant flows and the outer periphery of the cross section is composed of a flat heat transfer tube, the heat transfer tube is inserted into the fin for tight bonding The heat is characterized in that the through hole has a shape that substantially follows the outer periphery of the cross section of the heat transfer tube, and a fin collar is provided in a part of the periphery of the through hole to maintain a constant interval between the fins to be stacked. Exchanger. A fin collar is provided that rises from one of the two long sides of the through hole substantially vertically to the fin at a height equal to a certain interval between the stacked fins, and further, the leading end of the through hole is bent toward the outside of the through hole. The heat exchanger according to claim 1. The two opposing long sides of the through hole alternately rise with a predetermined width from a part of the long side of the through hole and rise substantially perpendicularly to the fin at a height equal to a fixed interval between the stacked fins. The heat exchanger according to claim 1, further comprising a fin collar that is bent at a tip end thereof in an outward direction of the through hole. From each of the two short sides of the through hole, a fin collar is provided that rises substantially perpendicular to the fin at a height equal to a fixed interval between the stacked fins, and further, the leading end of the through hole is bent outwardly of the through hole. The heat exchanger according to claim 1. Provided with a fin collar that is lower than the fin collar for holding the fixed intervals of the stacked fins, in addition to the fin collar for holding the fixed intervals of the stacked fins around the through hole. The heat exchanger according to any one of claims 1 to 4, wherein the heat exchanger is provided. A plurality of plate-like fins that are stacked in parallel at regular intervals and through which a gas such as air flows, and are inserted at a predetermined pitch substantially perpendicular to the fins and closely joined to the fins. In a fin-and-tube heat exchanger in which a fluid such as water or refrigerant flows and the outer periphery of the cross section is composed of a flat heat transfer tube, the heat transfer tube is inserted into the fin for tight bonding In order to form a through hole in a shape substantially along the outer periphery of the cross section of the heat transfer tube, and to provide a fin collar having a height lower than a predetermined interval between the fins to be stacked around the through hole, and to insert the heat transfer tube Separately from the fin collar provided in the through hole opened in the fin, the tip of the fin is subjected to a flaring process. Heat exchanger, characterized in that a fin collar substantially cylindrical household. Opening in the gas main flow direction at a height approximately half of the fixed interval of the fins to be stacked, in a region between the heat transfer tubes adjacent to each other in the direction perpendicular to the gas main flow direction, that is, the step direction, on the surface of the fin. The heat exchanger according to any one of claims 1 to 6, wherein a louver is provided. A gas having a height of about 1/4 to about 3/4 of a predetermined interval of the fins stacked in the region between the heat transfer tubes adjacent to each other in the direction perpendicular to the gas main flow direction, that is, the step direction, on the surface of the fin. The heat exchanger according to any one of claims 1 to 6, further comprising a cut-and-raised portion that opens in a mainstream direction. 9. The heat exchanger according to claim 8, wherein the width of the cut and raised is about 1/2 to about 2/5 of the width of the fin base. 2. A peak portion and a valley portion with ridge lines extending in a step direction are alternately provided in a region between the heat transfer tubes adjacent to each other in the direction perpendicular to the gas main flow direction, that is, the step direction, on the surface of the fin. The heat exchanger in any one of -6.

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